未经授权的访问异常不断显示

Question

I coded this app in Visual Studio using C#. In this app, I have to access a binary file from a location using a browse button and choose a saving location after the conversion. However, when clicking on the "Start Conversion" button, it keeps showing this UnauthorizedAccessException. We disabled everything in the computer (firewall etc..) but nothing seems to work. It keeps showing the exception. Here is the part of the code.

    private void StartConversion1(object sender, RoutedEventArgs e)
    {

        try
        {
            Byte[] a1 = File.ReadAllBytes(filePath1.Text);
            Byte[] a2 = new Byte[(a1.Length) / 2];


            a2[0] = a1[0];
            int i = 2;
            int j = 1;
            while (i < a1.Length)
            {

                a2[j] = a1[i];
                i = i + 2;
                j = j + 1;
            }
            try
            {
                File.WriteAllBytes(savingPath1.Text, a2);
                MessageBox.Show("Conversion Complete");
            }
            catch (UnauthorizedAccessException ex)
            {
                Form3 frm3 = new Form3();
                frm3.Text = "XGIGA formatter";
                frm3.ShowDialog();
            }
        } catch(FileNotFoundException ex)
        {
            string stackTrace = ex.ToString();
            Form1 frm1 = new Form1(stackTrace);
            frm1.Text = "XGIGA Formatter";
            frm1.ShowDialog();
        }
    }

Answer 1

I coded this app in Visual Studio using C#. In this app, I have to access a binary file from a location using a browse button and choose a saving location after the conversion. However, when clicking on the "Start Conversion" button, it keeps showing this UnauthorizedAccessException. We disabled everything in the computer (firewall etc..) but nothing seems to work. It keeps showing the exception. Here is the part of the code.

    private void StartConversion1(object sender, RoutedEventArgs e)
    {

        try
        {
            Byte[] a1 = File.ReadAllBytes(filePath1.Text);
            Byte[] a2 = new Byte[(a1.Length) / 2];


            a2[0] = a1[0];
            int i = 2;
            int j = 1;
            while (i < a1.Length)
            {

                a2[j] = a1[i];
                i = i + 2;
                j = j + 1;
            }
            try
            {
                File.WriteAllBytes(savingPath1.Text, a2);
                MessageBox.Show("Conversion Complete");
            }
            catch (UnauthorizedAccessException ex)
            {
                Form3 frm3 = new Form3();
                frm3.Text = "XGIGA formatter";
                frm3.ShowDialog();
            }
        } catch(FileNotFoundException ex)
        {
            string stackTrace = ex.ToString();
            Form1 frm1 = new Form1(stackTrace);
            frm1.Text = "XGIGA Formatter";
            frm1.ShowDialog();
        }
    }